As the mistake was carried out through the god Indra, he grants Hanuman a would like that his human body would be as robust as Indra's Vajra, and that his Vajra might also not hurt him. Along with Indra other gods have also granted him needs: the God Agni granted https://share.evernote.com/note/55aed3e0-2546-0faf-afdf-abaacafabe1d